become coveted pets. especially in japan, russia and the persian gulf. dr. nekaris is finding fewer of them in the jungle, but they're easy to find in the illegal animal markets of azy. their teeth removed with nail clippers. they sell for about $25. smuggled out of the country, though, they are worth thousands. are they endangered? >> they all are, yes. >> reporter: illegal trade -- >> is the number one threat. >> reporter: the world was a safer place for these animals, when the world beyond the jungle didn't know that the oh, so lovable loris existed. i'm jeffrey kofman for "nightline" in paignton, england. >> slow lorises airs november 20th on animal planet. part of their "frontier evert" sere reefs. thank you for watching abc news. "gma" in the morning, and have a great weekend.